Use gcc -ansi -pedantic in 9c. Fix many non-C89-isms.

src/cmd/grep/comp.c

@@ -128,12 +128,12 @@ loop:
 Rune	tab1[] =
 {
 	0x007f,
-	0x07ff,
+	0x07ff
 };
 Rune	tab2[] =
 {
 	0x003f,
-	0x0fff,
+	0x0fff
 };
 
 Re2
@@ -144,7 +144,7 @@ rclass(Rune p0, Rune p1)
 	Re2 x;
 
 	if(p0 > p1)
-		return re2char(0xff, 0xff);	// no match
+		return re2char(0xff, 0xff);	/* no match */
 
 	/*
 	 * bust range into same length

src/cmd/grep/main.c

@@ -170,11 +170,11 @@ loop:
 		increment(s, c);
 		goto loop;
 	}
-//	if(flags['2'])
-//		if(s->match)
-//			print("%d: %.2x**\n", s, c);
-//		else
-//			print("%d: %.2x\n", s, c);
+/*	if(flags['2']) */
+/*		if(s->match) */
+/*			print("%d: %.2x**\n", s, c); */
+/*		else */
+/*			print("%d: %.2x\n", s, c); */
 	lp++;
 	s = ns;
 	if(c == '\n') {

src/cmd/grep/sub.c

@@ -30,7 +30,7 @@ sal(int n)
 	State *s;
 
 	s = mal(sizeof(*s));
-//	s->next = mal(256*sizeof(*s->next));
+/*	s->next = mal(256*sizeof(*s->next)); */
 	s->count = n;
 	s->re = mal(n*sizeof(*state0->re));
 	return s;